Let \( a, b \) and \( c \) be the length of sides of a triangle \( A B C \) such that \( \frac{a... VIDEO
Let \( a, b \) and \( c \) be the length of sides of a triangle \( A B C \) such that \( \frac{a+b}{7}=\frac{b+c}{8}=\frac{c+a}{9} \). If \( r \) and \( R \) are the radius of incircle and radius of circumcircle of the triangle \( \mathrm{ABC} \), respectively, then the value of \( R / r \) is equal to :https://bit.ly/YTAI_PWAP https://www.pw.live
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